Sorry I am not keeping up with this too well. Most of my sparetime is currently dedicated towards trying to get Windows 10 to not give me BSOD's constantly. Windows and new hardware really do not mix well.
My good old Linux install though is perfectly happy though.

As for why I made it I tend to just make what I feel like. Some of them like the SEPECAT Jaguar are originally suggestions but other like the MiG-25 are just something I wanted to make.

If you look at the models I have posted though December several of them already exist in-game. Of the ones I have previously released several of them also already exist in some form. Others does not even exist in-game as designs.

Making regional textures for existing models have been suggested in the past but is not really a viable option in most cases as the BG models (including the MiG-25) uses mirrored UV maps.

Even simple styles like this one have issues with mirrored UV maps like the number on the fuselage and tail roundel and as they get more complex it just gets worse.

Here is an old example I made some time ago showing the restrictions mirrored UV maps poses.
Adding say text or a complex camouflage pattern to the existing MiG-25 model or most other SR2020 models is not really possible unless I accept very noticeable mirror lines.

While I can solve this issue the problem is it means editing the original model and reworking the texture map. The workload required to do this really starts approaching making a model from scratch.